Sorry OP - must seem a bit full-on, but what on earth do you think he is doing? It is quite severe - you're not eating, you're a nervous wreck, really unhappy, confused and totally tired out by his behaviour. It is not a small thing because it matters what effect it is having on you, and the effect on you is profound. He should not be allowed to behave like this. It is punishment. Who gives him the right to punish you? That's the question. What right does he have to do this to you?
He knows you are suffering, you are practically begging him to 'come round'and talk. He has got all the power here, and he is using it in a cruel way. That's why I said sadistic... there is no way he doesn't know what he is putting you through by doing this.
Anyone looking in from the outside of this relationship as you have described it i.e. people on this thread, OR anyone who has been persecuted by an emotional abuser i.e probably quite a few people on this thread - will recognize his behaviour as abusive.
If he is absolutely lovely and respectful the other 364 days of the year, well OK, but to me (and I know I am biased and probably projecting madly) this man shows all the signs of someone who does not view you as an equal partner and does not see why he should show you respect.
This may be 'his way of dealing with it', but guess what, his way of dealing with it leaves you....'overwhelmed','stressed' 'drained', 'sad' 'ruined weekend', 'tired mentally', 'can't cope'. What exactly is he training you for?
He is setting the weather for everyone in the house, he is holding you and dcs to ransom. This is not just 'cooling off'. It is cruel behaviour. Sulking serves his purpose - it's just a bit frightening for you contemplating what his purpose is *, and whether you want to be married to such a person.
- Power and control is the usual answer I'm afraid. And no, it's not stupid to ask why would someone want to do that to the person they are supposed to love and the mother of their children. But it is abuse and it is depressingly common.